Multi-channel LED Drivers backlight LCD panels.

Press Release Summary:

With data exchange done at 25 MHz over serial I/O connections, TB62777FNG and TB62778FNG deliver continuous current that can be regulated for illumination in backlighting of LCD panels, TV displays, and notebook PCs as well as RGB panel LED displays. Both 8-channel, constant-current LED drivers have 3.3-5 V supply voltage range and regulate current source through one external resistor. Output range is 5-40 mA, and current accuracy between channels is ±3% at 0.4-4 V output.

Original Press Release:

New High-Performance 8-Channel LED Drivers from Toshiba Produce Superior Illumination on Consumer Electronics Displays

Latham, New York: Marktech Optoelectronics expands its LED driver product family with two new high-performance devices from Toshiba. The TB62777FNG and TB62778FNG devices are 8-channel, constant current LED drivers delivering a continuous current that can be regulated for superior illumination in the back-lighting of LCD panels, TV displays and notebook PCs, as well as light control for large RGB panel LED displays.

The TB62777FNG and TB62778FNG are 8-channel, constant current LED drivers with serial-in/serial-out data transfer for dynamic displays. The LED drivers support a 3.3V to 5V supply voltage range and regulate the current source through one external resistor. The constant current output range is 5mA to 40mA; current settings for the TB62778FNG can be adjusted via a 7-bit serial data input. At an output voltage of 0.4V to 4V, the current accuracy between channels is +/-3% and between ICs, +/-6%. The LED drivers provide IC protection features including thermal shutdown. In addition, the TB62778FNG offers output open detection and output short detection. These modes enable the system designer to identify and capture hardware errors.

The TB62777FNG and TB62778FNG satisfy system requirements for high-speed data transmission. Data exchange for dynamic lighting of LED arrays is done at 25MHz over serial-in/serial-out connections of cascaded drivers. Both the TB62777FNG and TB62778FNG are fabricated using Toshiba's leading edge BiCMOS process. They are housed in a lead-free1 SSOP16 package with compact dimensions of 4.4mm (W) by 5.5mm (L).

Pricing and Availability
Samples of Toshiba's TB62777FNG are now available, and the devices are $1.20 each in 1,000 unit quantities. The TB62778FNG is also sampling now, priced at $1.32 each in 1,000 unit quantities. Both products are available through Marktech Optoelectronics, Toshiba's optoelectronic partner in the U.S. for over 23 years. For more information, please contact Marktech Optoelectronics at 3 Northway Lane North, Latham, NY 12110, Phone: (800) 984-5337, FAX: (518) 785-4725, email: Website:

Marktech Optoelectronics: Marktech has been an industry leader in the application and design of LEDs for over 25 years. Toshiba America Electronic Components, Inc. has chosen Marktech to handle all North American technical sales and marketing for their Toshiba LEDs and Toshiba Constant Current LED Drivers. In addition to their Toshiba line Marktech also offers a wide range of standard Discrete, Surface Mount, and Dot Matrix Displays along with a complete line of Photo Sensors.

1Toshiba Semiconductor Company defines "Lead (Pb)-Free" products as those containing no more than 0.1 percent lead (Pb) by weight in homogeneous materials. This does not mean that Toshiba Semiconductor products labeled "Lead (Pb)-Free" are entirely free of lead (Pb).

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